OFFSET
0,2
EXAMPLE
Some solutions for n=3
..3..0..2....5..1..3....4..3..2....3..2..4....0..2..2....0..5..3....5..4..1
..2..0..3....1..4..4....0..4..5....5..4..0....0..2..2....3..3..2....2..3..5
..0..5..0....3..4..2....5..2..2....1..3..5....4..0..0....5..0..3....3..3..4
CROSSREFS
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Feb 20 2002
EXTENSIONS
a(0)=1 prepended and a(6)-a(7) from Andrew Howroyd, May 11 2020
a(8)-a(9) from Sean A. Irvine, Dec 13 2023
STATUS
approved